Shears for glass blanks.



P. H. THOMPSON.

SHEARS FOR QLASS BLANKS.

APPucmoN FILED FEB. 6. 1915.

Patvntvd Aug. 13, 1918.

IN I/EIV TOR PflR/(f THUMPSUA/ 675 v WITNESSES momvns r when the cuttingmovement srarnsmrnm enmesruxn-k moxrsefiorkmLvrLL-E, new JDR'SEY;sssrenon 'ro MI LV ILLE Macm- To all whom it"may concern:

Be it known that I, PARKE H; THOMPSON, a citizen of the United States,residing at Millville, Cumberland county,

bottles and the like. ore particularly, my

shear is intended for use in connection with that class of bottle makingmaehines in which a quantity of glass is placed in a suitl6 able parisonmold, usually by suction, the excess glass then being cut off and theblank thereb formed being placed in a finishing mold or expansion *intoits final shape.

4 The object of'my invention is to provide 20 an improved shear whichshall sever the exce'ss glass by a motion which shall be bothin the lineof the cutting edge and at right angles thereto,; thus. cutting theglass smoothly instead of jaggedly as is the case p is entirely at rightangles to the cutting edge. 1

A further object of my invention is .to provide a knife or shear havingtwo cutting edges and so disposed that either one of said to edges maybe instanly put into-use without stopping the machine. v c

My invention will he betterunderstood by referring to the accompanyingdrawings which show the same as employedv for outting 01f parison blankssuch as would be pro-1' duced, for example, by suction from a pool ofglass up and into a suitable parison-mold.

In the drawings, Figure '1. represents a.

' plan view of a preferred embodiment of my shear in its relation to aparison blank fora glass bottle, as it would appear in a machine of thetype just specified, other parts of the machine being omitted asunessential; Fig. 2 represents an elevation of Fig. 1 and Fig.3repr'esents both a plan and an edge View' of the knife proper.

Referring to the drawings, the shear or knife proper 1 is of sheet steelor other suit-- able material, preferably semi-circular in 60 shape, andhas diametrally opposite lugs 2 'providedwith holes 3 which serve asshear holding means. lar contour, that is to say, approximately isbeveled on the. hpper side so as to pro--' 66 vide ,a sharp lower edge,while the other New Jersey, 5 have invented certain new and useful Im-'%llass articles, such as:

so as to provide a square shoulder a? tached to the table as a unit.

One-half of the semi-circu-' comm, OE'MILLVILLE'KEW Jnnsnr,"aconrone.'rron or NEW JERSEY.

non oztessstunts. 7 I e Specification a Letters new. PatentedAug;13,1918. Applicationnledhbruary16,1915. se namauas.

half, 'or 90, is beveled on the lower .side so as to provide a similarupper edge. The shear is operated by an air cylinder 4 fixed to thetable 5 and provided with. piston 6,

which operates a piston; rod Ii -The outer 60 end of 'the'piston rodcarries a pi'votpin 8- which engagesthe slot, 9 of a connecting link'10, the outer end of which is bent so as to behfiushwith table 5 and ispivotally attached thereto by a in 11. This outer end 66- of link 10 isrecesselfon its under side at 12 ainst.

which may be abutted the square en shear. The pivot pin 11, which has aneas fitin the end of link 10, also.drops throng 10 hole' 3 of the shear}-'Link 10 and shear-1 are r ve-1 y thus, rigidly united and are -InFigs. .1 and2 the parison mold-13 and the glass 14 with which itis'filled,'appeari as they would after the mold has'been OW-Q ered intothe molten glass,

suction applied" to fill the mold, and the latter a ain raised above thetable; the glass .of the b ank is still connected -with the glass of thepool and is .80

to be cut oil with .the shear, a Air is now ap lied to pipe l5'andpiston 6 moved to the right This causes the shear I to be rotated aboutthe fixed pivotjll so as v to sweep the outer edge 16 of the shear B5across the lower part of the blank and cut off the same flush with thetable 5. The mo- 1 tion with which the shear thus cuts off the blank isone which may clearly be resolved into two components, one tangential tothe N cutting edge and the other perpendicular thereto. The cut'ivill,therefore, be clean .and smooth. i When the one edge 16- has becomedulled so that it no longer makes a sharp clean out, 96

'pin 11 may be plucked out, the shear turned over end for end, and pin11 replaced. This places edge 17 in cutting position instead of edge 16as'before.

i As the outer endof link 10 and the shear 100 1 are normallyflush withand move upon the top of table 5 it is clear that'rigid and per- ,feotoperative connection is established between them by-use ofthe pin 11(which also serves as a pivot and is held in place merely by gravity).in View .of the shouldered re- :cvss 12 and the correspondingly-squaredend of lug 2.

By reason of the shear being always in contact with the table as itmoves to and fro in the performance of its cutting function, the edge ofthe'shear continues to, be

'continuousl resharpened automatically.

c Having I claim: I

1. Apparatus for' v cutting escribed my invention: f

01f parison blanks ;compris1n'g, in combination with a' table, a'flatedged shear having one end in contact with the table, a link having oneend incontact with the table but recessed upon its lower side to receivethe shear end,

and a pin through both link. and shear'end uniting .them together theend of said pin beingdetachably inserted in the table top.

2. Apparatus for cutting oif parison blanks comprising, in combinationwith a table, a semi-circular shear of sheet metal "having half of itscurved contour provided with an edge on theupper surface and the otherhalf with an edge on the lower surface and having its diametrallyopposite portions shaped as square ended lugs, a link having one end incontact with the table and its lower surface recessed to receive an endof the shear, registering holes in the engaged ends of link and shear,and a pinadapted to drop easily through said holes and into a bearing inthe table top.

-3. A semi-circular shear for glass prolugs half of the curved contourhaving a cutting edge on the lower surface of the shear and the'otherhalf having-a cutting edge on the upper ,surfaceof the shear.

4. A shear member for use in glass cutting. hpparatuspsaid member havinga.

curved contour at its'cutting edge, one portion of the cutting edgebeing on .the lower surface of said member and another portion of suchcutting edge beingon the upper surface-of the member, together'withmeans for holding the said member in either one of 1 two reversedpositions, substantially as described.

5. A-shear member for use in glass cutting 45 apparatus, said memberhaving a convex con-. tour at its cutting edge, one portion of the Icutting edge being on .the lower surface of my hand in the presence oftwo 'subscribirig- 55 witnesses.

VVitnesses 1 a THOMAS WHITAKER, MARY M, Twit.

PARKE H. THOMPSON,

3Q vided with diametrally opposite attaching Y

